5555.21
Petition relating to improvement in more than one county.

When the proposed improvement is in two or more counties or
along the county line between two or more counties in this state or extends
from one county into or through one or more adjoining counties in this state,
the petition described in section
5555.03 of the Revised Code may be
filed with the board of county commissioners of any one of the interested
counties. The board with which said petition is filed shall cause a certified
copy thereof to be filed with the board of each of the other counties in which
some part of the proposed improvement is situated.